Sewing-machine.



' No. 880,133. PATENTED FEB, 25, 1908.

J. PINK. SEWING MACHINE.

APPLIGATION FILED MAR. 2, 1907.

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No. 880,133. PATENTED FEB. 25, 1908. J. PINK. SEWING MACHINE.APPLICATION FILED MARQZ, 1907.

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JOHN Him, on NEW YORK,,N. Y.

' SEWING-MACHINE.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed March 2. 1907- Serial No. 360.238

To all whom it may concern:

Be it known that 1, JOHN FINK, a citizen of the United States, and aresident of New York, county and State of New York, have inventedcertain new and useful Improve ments in Sewing-Machines, of which thefollowing is a specification.

The present invention pertains to sewing machines, and more particularlyto an appliance therefor, whereby zig zag stitches varying from thewidth of a single seam line to any desired width can be attained andwhich allows of the controlling of the width of the stitches by hand,foot or knee, during the operation of the machine;

Hitherto, to obtain different widths in the stitches, an adjustingdevice has been used that permits of the adjustment of the needle onlywhen the machine is at rest, so that the latter cannot be used for theroduction of patterns of different shape, as owers or the ke, which ispossible with my appliance, so far as the adjustment of the needle fordifferent widths of the zig zag stitches can take place while themachine is in operation.

To make my invention more clear, I have illustrated the same in theaccompanying drawings, in which similar reference numerals denotecorresponding parts and in which Figure 1 is a side View of the sewingmachine equipped with my device; Fig. 2 a top plan view thereof, partlyin section; Fig. 3 a front view of the machine, from which the cover atthe forward end of the machine frame is removed; Fig. 4 is a verticalsection of the forward end thereof, and Fig. 5 is a cross sectionthrough Fig. 3.

With reference to the drawings, l denotes the frame of the sewingmachine, the latter being of ordinary construction and having the needlebar 2 secured in a swinging bracket 3. The latter has a bifurcatedprojection 4 which extends through the aperture 5 in the frame of themachine, and to which an extendible pitman 6 is hinged.

7 is a circular disk at the rear end of the machine that is geared tothe driving shaft 8 and that is provided with a cam groove 9.

10 is a connection link that has a projecting pin 11 guided in the camgroove 9, whereby the connecting link 10 during the rotation of thecam'disk 7 is given an oscillating movement.

12 is a slide, movable in guide grooves 13 in the connecting link andconnected or integral with the pitman 6. According to the adjustment ofthe slide 12 within the link 10 thisl width of the stitches can bevaried at W1 Thus far, the device is old. Hitherto, for the purpose ofeffecting the said adjustment, a set screw has been used, upon theslackening of which the position of the slide could be changed. Thisadjustment, however, could take place only when the machine was at rest.

The novel feature of my invention consists now in the provision of meanswhereby the adjustment of the slide 12 can be accomplished by foot, kneeor hand during the operation of the machine. For this purpose, thepitman 6 has an extension 14 at the rear side of the slide 12 and ishinged to a rod 15 that extends downwards therefrom. To the lower end ofthe rod, a cord 16 chain or the like is attached, that is guided over apulley 17 rotatively borne in the frame of the machine. Borne inbrackets 19 is a swinging shaft 20 that extends transversely to themachine and that at one end carries an arm 21 for the manipulationthereof. Rigidly secured to the said shaft20 is a bar 22 the forward endof which is connected with the rope or chain 16.

A coil spring 23 secured with one end to the frame of the machine andwith the other to the extension 14 of the pitman 6 or rod 15 tends topull the pitman 6 and the slide 12 respectively into initial position.By swin ing the arm 21 rearwards, the rod 22 pulTs the rope or chain 16to lift the rod 15 that displaces the slide 12 in the link 10. Thuswithout interrupting the work, the slide 12 can be adjusted andaccording to its position, the width of the stitches can be varied atwill. When it is desired to operate the device by the knee, a knee plate24 may be adjustably secured to the arm 21.

My device can be readily applied to different kinds of sewin machines,as for instance also to the so cal ed universal feed sewing machines.

I do not wish to restrict myself to the construction shown andspecified, as the same may be easily changed without deviating from thespirit of my invention, but

What I claim and desire to secure by Let-- ters Patent is:

In a sewing machine, the combination with the needle bar, of a swingingbracket for said bar, a pitman hinged to said bracket, a cam diskoperated from the driving shaft, a connecting link oscillated by saidcam disk, a r0d 0r handle for manipulating the said shaft slide formedon said pitman and movable in to adjust the slide, and a spring tendingto the connectinglinli, a rod hinged-to said pitreturn the latter intoinitial position, subman and projecting downwards, a pulley se- 1stantially as and for the purpose specified.

5 cured to the frame of the machine, flexible Signed at New York this 28day of Febru- 15 means attached to the lower end of said rod ary 1907.

and guided over said pulley, a swinging shaft JOHN EINK. supported inthe frame of the machine, a bar VVitness'es: rigidly secured to saidshaft and having its JOHN T. CARMoDY,

10 free end connected with the flexible means, a MAX D. ORDMANN.

